Self-oiling trolley.



No. 768,121. PATENTED AUG; 23, 17904.' F. HACHMANN.

SELF OILING' TROLLEY.

APPLICATION FILED 00T. l5, 1903.

No MODEL.'-

l No. 768,121.

c UNITED STATES Patented 'August 23, 1904.

PATENT OFFICE.

FREDERICK HACHMANN, OF ST. PAUL, MINNESOTA, ASSIGNOR OF THIRTY THIRTY-SECONDS TO FRANK L. GAZZOLO, JOHN R. PATTY, THOMAS BILLINGSLEY, STUART B. SHOTVVELL, OTTO MULLER. AND CHARLES i BRENCK, OF ST. PAUL, MINNESOTA.

SELF-OILING TROLLEY.

SPECIFICATION forming part of Letters Patent No. 768,121, dated August 23, 1904.

l Application ied Qctober 15, 1903. `Serial No. 177,125. (No model.)

T0 a/ZZ whom it may concern:

Be it known that I, FREDERICK HAcI-IMANN, a citizen of the United States, residing at St. Paul, in the county of' Ramsey and State of Minnesota, have invented certain new and useful Improvements in Self-Oiling Trolleys; and I do hereby declare ythe following to be a full, clear, and exact description of the invention, such as will enable others skilledin thev art to which it appertains to make and use the same.

My present invention relates to trolleys for electric railways, -and has for its object to provide automatic oiling device therefor.

The invention consists'of the novel devices and combinations of devices hereinafter described, landdefined in the claims.

The invention is illustrated in the accompanying drawings, wherein like characters indicate like parts throughout the several views. Figure 1 is a view, principally in side elevation, but with some parts sectioned on the lines m of Fig. 2, showing a trolley pole and wheel equipped in accordance with my invention. Fig 2 Ais a section on the line m2 m2 of Fig. 1, some parts being left in full; and Fig. 3 is a detail showing the hollow journal or bearing shaft of the trolley, the same being sectioned in the line m2 m2 of Fig. 1.

The numeral 1 indicates the trolley-pole, having at its free end a pronged bearing-head 2, seated in the prongs of which is a hollow journal or stub shaft. 3, having at one end a head 4 and at its other end a reduced threaded portion 5. A anged cap-nut 6 is screwed onto the threaded portion' and completes the reduced end of the said shaft 3. The said cap of course serves to'hold the shaft 3 in working position or against endwise displacement. A key-lug 7 on the shaft 3 engages a notch or seat in one of the prongs of the head chamber or cavity 8. The slot 9 affords a seat for 'a rectangular body 10, of absorbent When the cap-nut 6 is removed from the threaded shaft-section 5,oil may be introduced into the oil-receiving cavity or chamber of the shaft 3 by inserting the nozzle of an oil-can through the perforation 13 of the washer 12, and'this washer, as is obvious, will cause the said cavity to hold the oil inserted therein.

Within the cap-nutA 6 is a gasket 14., of leather .or similar pliable material, which when the cap nut is in working position tightly closes the perforation 13 and cuts off the escape of oil, except such as is carried off by capillary attraction by the absorbent plug or body 10. This absorbent body, it will be noted, yis'located at a point -nearer to the top than to the bottom of the journal. It will, however, be keptsaturated with oil from the cavity of the shaft 3 under the vertical movements of the trolley, which will keep more or less of the oil splashing about within -the said cavity or chamber.

The trolley-wheel 15 is of course journaled on the intermediate portion of the shaft 3 between the prongs of the trolley-head 2. To

increase the life of the trolley-wheel, it is provided with a detachable bushing 16, which the absorbent block or packing 10 extends longitudinally of the shaft slightly less than the hub and bushing of the trolley-wheel, so that the entire surface of the bushing will be kept lubricated. I also believe it to be desirable to keep the grooved face ofthe trolley- Wheel coated With graphite, and to this end I provide the trolley-head 2 with a detachable axially-projecting thimble or holder 19, which is preferably s cre\v-threaded into the socket thereof. Within the thimble 19 I place a oylindrical stick 20 of graphite. This stick of graphite is preferably provided with a thin covering of soft lead 21, which holds the same 1n form. A short spring 22, compressed between the bottom of the thimble 19 and the inner end of the graphite stick 20, keeps the projecting end of the latter lightly pressed against the grooved face of the trolley-wheel. What I claim, and

desire to secure by Letters Patent of the United States, is as followsf l. The combination With a hollow shaft adapted to contain oil, said shaft being open at one end and having a radial oil-delivery passage, of absorbent material within said radial passage, a wheel rotatively mounted on said shaft and running over the exposed portion of said absorbent material, a washer closing the open end of said shaft and having' a perforation at its upper portion, and a cap-nut applied to the open end of said shaft and normally closing the perforation of said washer, substantially as described.

2. The combination of the hollow-hczuled shaft 3, said shaft being open at one end and having the radial oil-feeding passage E), the absorbent material 10 located in said passage E), the Washer 12 closing the open end of said shaft and having the perforation 13, the capnut 6 screw-threaded on theopen end of said shaft and provided with the pliable gasket 14; normally closing the perforation 13 of said Washer 12, and the wheel mounted on said shaft andl running over the exposed surface of said absorbent packing' 10, substantially as described.

In testimony whereof I afiix my signature in presence of two witnesses.

FREDERICK HACHMAN N.

VitneSSeS:

ELIZABETH H. KELUIER, F. D. MERCHANT. 

